.mosaic_gallery {
  width: 937px;
  height: 359px;
  position: relative;
  margin-left: 3px;
  background-repeat:no-repeat;
}
.mosaic_gallery .overlay {
  width: 100%;
  height: 100%;
  background-color: #000;
  opacity: 0;
  display: none;
  position:absolute;
  top:0;
}
.mosaic_gallery .hover {
  z-index: 10;
}
/*Tile Sizes*/
.mosaic_gallery .tile {
  position: absolute;
  width: 71px;
  height: 71px;
  display: block;
}
.mosaic_gallery .tilex2 {
  width: 143px;
  height: 143px;
}
.mosaic_gallery .tilex3 {
  width: 215px;
  height: 215px;
}
/* Columns */
.mosaic_gallery .col1 {
  left: 0;
}
.mosaic_gallery .col2 {
  left: 72px;
}
.mosaic_gallery .col3 {
  left: 144px;
}
.mosaic_gallery .col4 {
  left: 216px;
}
.mosaic_gallery .col5 {
  left: 288px;
}
.mosaic_gallery .col6 {
  left: 360px;
}
.mosaic_gallery .col7 {
  left: 432px;
}
.mosaic_gallery .col8 {
  left: 504px;
}
.mosaic_gallery .col9 {
  left: 576px;
}
.mosaic_gallery .col10 {
  left: 648px;
}
.mosaic_gallery .col11 {
  left: 720px;
}
.mosaic_gallery .col12 {
  left: 792px;
}
.mosaic_gallery .col13 {
  left: 864px;
}
/* Rows */
.mosaic_gallery .row1 {
  top: 0;
}
.mosaic_gallery .row2 {
  top: 72px;
}
.mosaic_gallery .row3 {
  top: 144px;
}
.mosaic_gallery .row4 {
  top: 216px;
}
.mosaic_gallery .row5 {
  top: 288px;
}